Exquisite Corpse

The phrase "exquisite corpse" originates from a surrealist game in which sentences were created by a group of people, each person not knowing what the previous words were. In this WAD, each of the 12 authors was given a block of space 1024x1024 units big and asked to create a part of a larger level. However, all they were given to guide them were small slivers of the previously created pieces adjacent to theirs.